If you want to add customer reviews on product page tab these steps may help you.
Locate and open your theme’s catalog.xml file
Look for handle named <catalog_product_view>
<block type="catalog/product_view" name="product.info" template="catalog/product/view.phtml">
Add your review list tab and review form as shown below.
<block type="catalog/product_view_tabs" name="product.info.tabs" as="info_tabs" template="catalog/product/view/tabs.phtml">
<action method="addTab" translate="title" module="review">
<alias>product_review</alias>
<title>Reviews</title>
<!--we can add block in tab like below-->
<block>review/product_view_list</block>
<template>review/product/view/list.phtml</template>
</action>
<block type="review/form" name="product.review.form" as="review_form"/>
</block>
Finally, we need to make these changes to the theme’s template file
review/product/view/list.phtml
On this file and near the bottom of it, look for and comment out this line
#echo $this->getChildHtml('review_form')
Then, add this line underneath or at the top -- as required
$layout = Mage::getSingleton('core/layout');
echo $layout->getBlock('content')->getChild('product.info')
->getChild('info_tabs')->getChild('review_form')->toHtml();
Okay, I heard it, why I have used
$layout = Mage::getSingleton('core/layout');
If this is something you don’t want to use, you can also use
echo $this->getLayout->getBlock('content')->getChild('product.info')
->getChild('info_tabs')->getChild('review_form')->toHtml();
Hope this helps.